baber/WOPTO huggingface dataset:
Patent GB-1396433-A (GB)
Title: Optical communication systems
IPC: G02F1/01
Filed: 1972-11-24
Abstract: 1396433 Modulating light POST OFFICE 2 Nov 1973 [24 Nov 1972] 54412/72 Heading H4F A section of a dielectric optical waveguide having a core and cladding is subjected to an electric field of an intensity which varies in a spatially undulating manner along the guide and produces a corresponding refractive index variation in the core, whereby optical energy in the core is transferred from a first mode of propagation to at least one other mode of propagation and/or a non-propagating mode. Transfer between modes is said to reduce the effects of group dispersion when using multimode guides in telecommunications, i.e. the phenomenon whereby pulses become distorted and lost due to different propagation velocities of different modes. Transfer to a non-propagating mode, in which light is radiated from the guide, is useful for intensity modulation, i.e. by varying the intensity of the electric field, the intensity of the light still propagating within the guide is controlled. In the latter case a single mode or multi-mode guide may be used. As particularly described, the field may be orthogonal to the waveguide axis and provided by a series of electrode strips tangential to the circumference of the guide, and, diametrically opposite, a second corresponding series of such strips or a tangential plate electrode. Alternatively, a field parallel to the guide axis may be provided by a series of electrode rings circumjacent the waveguide surface, alternately connected to opposite poles of a source of potential difference. The electrodes may be produced photo-lithographically, e.g. with a mask, or via laser interference fringes, or the parallel strips may be a wire grid. The Specification discusses criteria for determining the pitch of the spatially undulating field to effect transfer substantially between predetermined modes. It would appear possible for transfer to a non- propagating mode to occur directly or via intermediate (higher) propagating modes. If the pitch is strictly constant transfer to modes other than those predetermined is restricted, but by varying the pitch in a pseudo-random manner, i.e. between predetermined limits, other modes are coupled more efficiently, this being particularly useful when intensity modulation is required. As particularly described the waveguide may comprise a nitrobenzene core with soda-glass cladding, or a core of solid metanitroaniline with its C-axis parallel to the core axis in a flint glass cladding.
Patent GB-1177589-A (GB)
Title: Pneumatically Operable Hydraulic Jack.
Inventor: SANO NORIMASA
IPC: B66F5/04
Filed: 1968-11-22
Abstract: 1,177,589. Hydraulic jacks. YASUI SANGYO CO. Ltd. 22 Nov., 1968, No. 55582/68. Heading B8J. [Also in Division F1] A wheeled hydraulic garage jack driven by compressed air connected from a source (not shown) to the jack body at 11 comprises a lifting arm 5, journalled at a shaft 8, with a load table 7 and a parallel link 9. The compressed air supply is fed from the jack body inlet 11 through a hose 13 to an inlet 12 on the power generating means 3. A spring-loaded ball valve 14 may be opened by operating a lever 17 to feed the compressed air into an air chamber 18 to drive an air piston 20 to the left as shown in Fig. 2, compressing a return spring 22 and driving a plunger.21. When the head of the air piston 20 reaches an exhaust port 24 the compressed air passes through a conduit 26 into a chamber 25 and drives an air exhaust valve member 27 to the left until a groove 28 communicates with the air chamber 18. This connects the chamber 18 to the atmosphere through an opening 29. This reduces the pressure in the chamber 18 so that the spring 22 returns the piston 20 to its original position together with the plunger 21 and valve 27 to restart the cycle. The reciprocation of the plunger 21 draws oil from a tank 31 and forces it into a space 35 in cylinder 36 to force piston 37 to the left. The pressure is transmitted through piston-rod 38 to the lifting arm 5. A needle valve 39 is provided to permit the escape of oil from the cylinder 36 into the tank 31. The valve 39 is operated through a spring-loaded lever 41. The two levers 17, 41 may be selectively operated by rotating an actuator member 53 at the end of a rod 48 passing through outer sleeve 49 of a handle 10. The handle 10 can be set vertically, horizontally or mid-way between, as may be convenient. The rate of lifting is controlled by the controlled rotation of the rod 48.
Patent GB-1123939-A (GB)
Title: Ultrasonic apparatus for measuring the position of a liquid level
Inventor: BUIS HENDRIK
IPC: G21C17/035
Filed: 1966-12-13
Abstract: 1,123,939. Ultrasonic measurement of liquid level. COMMISSARIAT A L'ENERGIE ATOMIQUE. 13 Dec., 1966 [15 Dec., 1965], No. 55822/66. Heading H4D. In an ultrasonic liquidlevel gauge, ultrasonic waves are conducted through a guide vowprising a tube filledhithan auxiliary liquid moaing acoustic properties similar to those of the liquid whose level is to be gauged. For measuring the level 17 of liquid sodium or sodium - po - tassium coolant 51 in a nuclear reactor vessel the tube 1, containing a eutectic sodiumpotassium mixture, is adjustably mounted in the vessel wall by means of flanges 15, 16, screws 19 and metal bellows 18. The tube 1 is sealed by acoustically transparent end-plates 3, 4, and is surrounded by perforated tube 28 which dampens movements of the coolant surface 17 and also supports a conical reflector 22. Ultrasonic pulses generated by a quartz transducer 6 (adjustably mounted in a kerosene-filled casing 5) pass through the waveguide, are reflected from reflector 22, and pass between tubes 1 and 28 to the coolant surface 17 from which they are reflected back via the same path to the or a further transducer. The echo-time of a pulse provides a measure of the coolant level. Lugs 31 at known positions in tube 28 provide reference echoes for calibration purposes. In alternative embodiments the gauge is mounted in or near the bottom of the reactor vessel (Figs. 3 and 4, not shown), whereby the ultrasonic pulses can be directed through the waveguide to the coolant surface without the need for the conical reflector 22, or is mounted in the vessel side wall (Fig. 5, not shown) with the waveguide horizontal, a plane reflector being used to direct the pulses upwards to the coolant surface.
Patent GB-1338410-A (GB)
Title: Toxic media
IPC: A01N25/16
Filed: 1971-11-24
Abstract: 1338410 Pesticidal foam WALTER KIDDE CO Ltd 24 Nov 1971 [24 Nov 1970] 55941/70 Heading ASE [Also in Division B1] Pesticidal foam comprises a high-expansion foam having an encapsulated toxic gaseous material, the foam persisting without significant collapse for a period of from one to twentyfour hours. The foam has a volume gas/liquid ratio of 150:1 to 1200:1. Toxic gaseous material comprises gases incapable of supporting life, e.g. CO 2 .
Patent GB-1421776-A (GB)
Title: Procedure for the manufacutre of silicone pastes
IPC: C08L83/04
Filed: 1972-12-05
Abstract: 1421776 Ti and B-containing silicone greases MINERALIMPEX MAGYAR OLAJ-es BANYATERMEKEK KULKERESKEDELMI VALLALAT 5 Dec 1972 55982/72 Heading C3T [Also in Division C5] A silicone grease is obtained by incorporating an inorganic filler of colloidal particle size into the product obtained by mixing a liquid silanolterminated polysiloxane with at least two different liquid polysiloxanes terminated with groups other than silanol groups, at least one of which is inertly terminated, and a titanium compound, and optionally a boron compound, capable of reaction with the silanol groups to give polymers containing tri- and tetrafunctional Ti and trifunctional B, if present, chain building members, said product containing 50-500 Si atoms per atom of Ti plus B and having alkoxy or OH for 2-50% of its end groups. In the examples titanium tetrabutylate with and without tri-ethyl or tri-butyl borate is added to a mixture of an inertly terminated polydimethylsiloxane of 20 cS./25‹ C. with an inertly terminated polydimethylsiloxane or polymethylphenylsiloxane of 350cS./25‹ C. and a silanol-terminated polydimethylsiloxane of 1000 cS./25‹ C., and optionally an ethoxy-terminated polydimethylsiloxane of 1000 cS/25‹ C. or a chlorinated low viscosity polymethylphenylsiloxane. To the product liquid is added pyrogenic silica or colloidal Al silicate, to give pastes which can be applied to insulators, directly or dispersed in CCl 3 CH 3 , or used as a mould release agent, or a mixture of pyrogenic silica, hydrophobized aluminium silicate and MoS 2  to give a bearing lubricant.
Patent GB-1117722-A (GB)
Title: Steel wool soap pad and method of making same
IPC: A47L17/08
Filed: 1966-12-14
Abstract: 1,117,722. Scouring pads. C. J. DEMRICK. 14 Dec., 1966, No. 56044/66. Heading A4R. A scouring pad 14 comprises a steel wool ribbon 24 wound around a soap core 38 with additional soap layers 18 disposed between adjacent layers of the steel wool, the pad has a compressed periphery (62). In making the pads 14 steel wool 12 is drawn from a roll 12 by intermittently rotated gears 26, 28 past a soap spray 16 and through a ribbon inverting station 20. Alternatively the steel wool 12 is sprayed on both surfaces and the inverting station 20 is omitted. Continuously driven gears 32, 34 tear off predetermined lengths of ribbon 24 and advance them beneath a nozzle 36 which deposits a soap core 38 on the leading end of the ribbon 24. The ribbon 24 is then carried through a winding station 40 on an endless belt 44. A flexible vane 48 rolls back the leading end of the ribbon 24 which subsequently engages a stationary guide 50 to continue the roll 42. The roll 42 falls into a die 54 to be peripherally compressed between press members 56, 56<SP>1</SP> prior to discharge on to a belt 60.
Patent GB-1097234-A (GB)
Title: Transmission gate
IPC: H03K17/687
Filed: 1966-12-14
Abstract: 1,097,234. Transistor switching circuits. RADIO CORPORATION OF AMERICA. Dec. 14, 1966 [Dec. 21, 1965], No. 56049/66. Heading H3T. A transmission gate comprises a pair of fieldeffect transistors 32, 60 of opposite conductivity type and having their conduction paths connected in parallel between an input 12 and an output 24, and means for applying signals to the gates of the transistors to render both transistors conducting or non-conducting concurrently. The gate is non-conductive when the gate of P-type transistor 60 is at + V 0  volts and the gate of N-type transistor 32 is at 0 volts, but is rendered conductive by the application of an 0 volt signal to the gate of transistor 60 together with a V 0  volts signal to the gate of transistor 32, thus allowing a logic level of + V 0  or 0 volts at 12 to be transmitted to 24. Should point 12 be at V 0  volts when the gate becomes conductive, capacitor 28 (for example the input capacitance of the next stage) charges towards + V 0  volts through both transistors 32 and 60, but transistor 32 cuts off when the capacitor charges to such a voltage that the voltage between gate 38 and electrode 36 is insufficient to maintain conduction. However, transistor 60 remains biased to conduction by the voltage applied between gate 66 and electrode 62, so that capacitor 28 attains the full voltage V 0 . Alternatively, should point 12 be at 0 volts and, initially, capacitor 28 positively charged, capacitor 28 discharges through transistors 32, 60, but in this case transistor 60 cuts off when the voltage across 64-66 falls below the threshold, and transistor 32 remains biased to conduction by the voltage across 34-38 to allow the capacitor to completely discharge. Thus, in both cases, the voltage appearing at point 12 is fully transmitted to point 24. The transistors may be of the MOS or thin film insulated-gate types.
Patent GB-1294453-A (GB)
Title: Self-fusing electrically insulating tape
IPC: H01B3/50
Filed: 1969-11-17
Abstract: 1294453 Rubber/resin compositions MINNESOTA MINING & MFG CO 17 Nov 1969 [18 Nov 1968] 56168/69 Headings C3P and C3Q [Also in Division B2] Elastomeric sheet compositions comprise an ethylene-propylene-diene terpolymer of Mooney value 70, butyl rubber including 1-1À4 mol. per cent isoprene, polyethylene of molecular weight c. 150,000, carbon black, diatomaceous earth, naphthenic rubber process oil, glyceryl ester of hydrogenated resin and a thermoplastic terpene resin, and in one case additionally contain quinone oxime dibenzoate, red lead, sulphur, and zinc oxide. An adhesive composition comprises crude natural rubber, two different thermoplastic polyterpene resins, heat-treated wood rosin, para-substituted phenol-aldehyde tackifier resin, zinc resinate, 2,5-ditert.-amylhydroquinone, zinc oxide, titanium oxide, Sumatra yellow pigment and heptane as solvent.
Patent GB-1178140-A (GB)
Title: Improvements in and relating to Fuses
IPC: H01H85/10
Filed: 1967-12-12
Abstract: 1,178,140. Fusible cut-outs. CANADIAN GENERAL ELECTRIC CO. Ltd. 12 Dec., 1967 [28 Dec., 1966], No. 56354/67. Heading H2G. A cartridge-type fuse comprises a plurality of fusible elements 14, 15 in the form of long, thin, narrow strips having alternate short straight portions 32, 33 and longer bowed portions 42, 43 all bent to the same side of the strip, the strips being embedded in arc-extinguishing material filling casing 11. The strips are held between insulating annular discs 17, 18 which are wedged between caps 12, 13 and each end of the casing, these discs having radial slits 28 into which the ends of the fusible elements are slotted. Dents 29 in the strips enable them to be held in light tension. The metallic caps 12, 13 comprise an end part 25 whose edge is rolled over the flared end of sleeve part 21, the ends of the fusible elements being gripped between the two parts in this process in order to make a good electrical connection. The strips may have holes 53, 54 in each bowed portion or a single hole in each straight portion in order to create regions of reduced cross-section. An additional fusible element 16 fuses after the other elements have fused, thereby triggering device 20 which indicates visually that the fuse has blown.
Patent GB-1180169-A (GB)
Title: Automatic Gain Control System
Inventor: SHIMAYAMA HIROAKI
IPC: H03G3/20
Filed: 1968-11-27
Abstract: 1,180,169. Automatic gain control. NIPPON ELECTRIC CO. Ltd. 27 Nov., 1968 [3 Dec., 1967], No. 56371/68. Heading H3Q. In a receiver for frequency modulation multiplex communications signals comprising an I.F. amplifier stage 2 having a frequency bandwidth-provided by filter 1-sufficient to cover the FM signal modulated by the multiplex signal gain control detector 5 is fed over a filter 4 of narrower bandwidth. The arrangement gives improved performance in the region where the signal/noise ratio is small (Fig. 2, not shown).
Patent GB-1337964-A (GB)
Title: Crystalline n,n,-dibenzamidoperylene-3,4,9,10-tetracarboxylic acid diimide
IPC: C08L33/00
Filed: 1970-11-27
Abstract: 1337964 Colouring polymers CIBA GEIGY AG 27 Nov 1970 [28 Nov 1969] 56519/70 Headings C3P and C3R [Also in Division C4] In example 11, a stoving lacquer contains 58À5 g. of a 6% solution of a coconut-oil alkyd resin in xylene, 23 g. of a 65% solution of a melamine-lacquer-resin in butanol, 17 g. xylene, 1À5 g. butanol, 5 g. of titanium dioxide and 1 g. of the #-crystal form of N,N-dibenzamidoperylene-3,4,9,10-tetracarboxylic acid di-imide. In Example 12, 6À7 g. P.V.C. powder, 33 g. dioctylphthalate, 2 g. dibutylt in laurate, 0À3 g. of a phosphate stabilizer and 0À7 g. of the #-crystal form of N,N-dibenzamido-perylene- 3,4,9,10-tetracarboxylic acid di-imide are mixed at 160‹ C. and then calendered to form a sheet 0À4 mm. thick.
Patent GB-1225012-A (GB)
Title: Improvements in or relating to the treatment and/or handling of iron ore
Inventor: LEIGH BRYAN
IPC: G01N23/12
Filed: 1967-12-13
Abstract: 1,225,012. 012. Gamma ray analysis of iron ore. SIMON CARVES Ltd. Dec. 11, 1968 [Dec. 13, 1967], No. 56661/67. Heading G1A. The iron content of iron ore is determined by irradiating the ore or a slurry thereof with gamma rays in the energy range 0À04 to 0À1 MeV and measuring the backscattered or transmitted radiation intensity. The source of gamma rays is preferably Am 241 or Tm 170, and the detector may be a scintillation counter, geiger counter or ionization chamber. For backscatter measurements, a scintillation counter with a centrally mounted back-shielded Am 241 source is used. Crushed or powdered ore is investigated on a conveyer having scrapers to produce a uniform thickness (slightly greater than the saturation depth for backscatter measurements); more than one source detector combination may be arranged across the conveyer. Ore slurry may be passed through a cell having an acrylic resinous window for backscatter measurements or two such opposed windows for transmission measurement. If the solids content of the slurry is liable to vary a density gauge may be used in conjunction with the invention. The measurements may be used to control mining and/or handling and/or smelting. The apparatus may be standardized by periodically presenting to it standard samples, methyl methacrylate blocks or a small standardization source.
Patent GB-1438126-A (GB)
Title: Oscillator unit and method of digital  adjustment of output  frequency thereof
IPC: G06F7/68
Filed: 1973-12-12
Abstract: 1438126 Electronic timepieces INTERSIL INC 12 Dec 1973 [16 July 1973] 57626/73 Heading G3T [Also in Division H3] In an arrangement comprising an oscillator 21 coupled to a frequency translator 23, the output frequency is initially set by an array of elements in the frequency translator which determine the input/output frequency relationship. To set the frequency of the arrangement, which is an electronic timepiece, the output frequency from a frequency divider 24 following the translator 23 is compared with a reference source 32 in a programmer 31 which produces output signals on lines 33 to permanently short circuit selected diodes in the frequency determining circuit of the translator. The frequency translator includes a frequency changer stage, Fig. 3 comprising two CMOS elements 44, 48 which produce at output 46 the sum of the two frequencies applied at inputs 42, 51.
Patent GB-1270605-A (GB)
Title: A stored energy control mechanism, particularly for a circuit breaker
IPC: H02K15/16
Filed: 1969-11-26
Abstract: 1,270,605. Spring power-storing mechanisms; toggles. MERLIN GERIN. 26 Nov., 1969 [20 Dec., 1968], No. 57817/69. Headings F2K and F2S. [Also in Division H1] A spring power-storing mechanism which controls the operation of a circuit breaker (not shown) comprises a spring 30 charged by rotation of a shaft 14 through the intermediary of a crank 16 and a toggle linkage 20, 24, movement of which is controlled by a guide means 40. The shaft 14 is driven intermittently or continuously in the direction A by, e.g. an electric motor. As the crank 16 rotates the spring 30 is charged by the moving apart of points 22 and 28, and the lever 20 moves up until a roller 36 abuts the cam 40, causing the toggle linkage to collapse. The energy stored in the spring rotates the shaft 14 and causes a cam 42 to close the circuit breaker contacts.
Patent GB-1254464-A (GB)
Title: Process for disproportionating toluene
IPC: B01J29/90
Filed: 1968-12-05
Abstract: 1,254,464. Disproportionation catalysts. TORAY INDUSTRIES Inc. 5 Dec., 1968 [7 Dec., 1967], No. 57895/68. Heading B1E. [Also in Division C5] Disproportionation catalysts comprise (a) a dealkalised natural or syntheic clinoptilolite (i.e. at least 50% in the H-form), and (b) an aluminium fluoride having a crystallite size, before use, of less than 1700A, and optionally (c) copper and/or silver e.g. as a nitrate or chloride. Suitable aluminium fluorides include aluminium fluoride trihydrate and basic aluminium fluorides. Preparation of these catalysts is described.
Patent GB-1377766-A (GB)
Title: Fluorocarbon surfactants
IPC: C07F9/38
Filed: 1971-12-16
Abstract: 1377766 Fluorinated polyethers IMPERIAL CHEMICAL INDUSTRIES Ltd 7 March 1972 [16 Dec 1971] 58397/71 Heading C2C [Also in Divisions C3 and C5] Novel non-ionic surface-active compounds comprising a single chain of repeating fluorinefree non-ionic hydrophilic units and at least two terminal hydrocarbon groups of at least three carbon atoms, in particular compounds having the structure R f -Z-O-(CHR-CH 2 -O) p -Z-R f , wherein R f  denotes a C 3-20  perfluoroalkyl or perfluoroalkenyl group, Z denotes -CO-, -SO 2 -, -OC 6 H 4 CH 2 -, -C 6 H 4 CO-, -C 6 H 4 SO 2 -, -CH 2 CH 2 -, -(CH 2 ) n CO-, -CONH(CH 2 ) n NHCO- or -SO 2 N(R)CH 2 CH 2 -, R denotes hydrogen, methyl or ethyl, n is an integer of from 1 to 6 and p is a number of from 2 to 100, are prepared by reacting a compound containing a perfluorocarbon group of at least three carbon atoms and a group reactive to a hydroxyl group with an organic compound containing either at least two hydroxyl groups or at least one hydroxyl group and a perfluorohydrocarbon group of at least three carbon atoms in the presence of a proton acceptor. Specified compounds include C 10 F 19 O(CH 2 CH 2 O) 7 C 10 F 19 , where C 10 F 19  denotes a branched perfluoroalkenyl group derived from tetrafluoroethylene pentamer.  Uses.-As surfactants for the improvement of self-levelling and high gloss in polishes and water-based paints.
Patent GB-1355130-A (GB)
Title: Terminal equipment
IPC: H02J3/36
Filed: 1971-12-21
Abstract: 1355130 HVDC power transmission CANADIAN GENERAL ELECTRIC CO Ltd 21 Dec 1971 [24 Dec 1970] 59328/71 Heading H2F In an HVDC station comprising a plurality of series-connected converter groups, at least one of said groups is by-passed by a series arrangement of an inductor and a switch, the switch being closed under conditions of low load current. As described, the invention comprises a plurality of three-phase bridges of thyristors or mercury arc valves connected in series across an HVDC transmission line, the bridge at the highest voltage end being by-passed by the line smoothing inductor and a switch in the form of a thyristor, mercury arc valve or circuit breaker, which is closed in response to reduction in current on the D.C. side so that by adjustment of the conduction angle of the by-passed bridge, the appropriate inductive components can be provided to compensate for voltage rise due to capacitance on the A.C. side.